<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>06-includes</title>
</head>
<body>
    <script>
        // includes() 表示某个数组是否包含给定的值，返回布尔值

        console.log([1,2,3].includes(2));  // true
        console.log([1,2,3].includes(5));  // false
    </script>
    
</body>
</html>